Despite their __________ of interest, Fleming kept trying to develop the chemical ___________ it would be safe and effective.
A．lacking; in order toB．lack; so that
C．lack; so as toD．lacking; so that
B
    
試題分析:考查名詞和目的狀語。根據(jù)their可知后面填名詞lack，排除A、D選項(xiàng)；而in order to和so as to后面跟動(dòng)詞原形，so that引導(dǎo)目的狀語從句， 由此可知B選項(xiàng)正確。.句意：盡管他們對此缺少興趣，弗萊明堅(jiān)持努力去研究這種化學(xué)物質(zhì)，為的是讓它更安全有效。
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